CODEWITHSUNDEEP
elasticsearch
curious1
curious1

Reputation: 14717

Elasticsearch: multiple languages in two fields when the query's language is unknown or mixed

I am new to Elasticsearch, and I am not sure how to proceed in my situation.

I have the following mapping:

{
    "mappings": {

        "book": {

            "properties": {         
                "title": {
                    "properties": {
                        "en": {
                            "type": "string",
                            "analyzer": "english"
                        },
                        "ar": {
                            "type": "string",
                            "analyzer": "arabic"
                        }
                    }
                },

                "keyword": {
                    "properties": {
                        "en": {
                            "type": "string",
                            "analyzer": "english"
                        },
                        "ar": {
                            "type": "string",
                            "analyzer": "arabic"
                        }
                    }
                }
            }
        }
    }
}

A sample document may have two languages for the same field of the same book. Here are two example documents:

{
    "title" : {
        "en": "hello",
        "ar": "مرحبا"
    },
    "keyword" : {
        "en": "world",
        "ar": "عالم"
    }   
}

{
    "title" : {
        "en": "Elasticsearch"
    },
    "keyword" : {
        "en": "full-text index"
    }   
}

When I know what language is used in query, I am able to build query as follows (when English is used):

"query": { 
    "multi_match" : {
        "query" : "keywords",
        "fields" : [ "title.en", "keyword.en" ]
    }
}

Based on my current document mapping, how can I build a query if

  1. the query language is unknown or
  2. is mixed with English and Arabic?

Thanks for any input!

Regards.

p.s. I am also open to any improvement to the above mapping.

Upvotes: 0

Views: 1343

Answers (1)

dark_shadow
dark_shadow

Reputation: 3573

the query language is unknown

You can use same multi match query but on all the fields.for eg, Assuming you are using keyword analyzer

"query": { 
    "multi_match" : {
        "query" : "keywords",
        "fields" : [ "title.en", "keyword.en", "title.ar", "keyword.ar" ]
    }
}

is mixed with English and Arabic

You need to change the analyzer to standard and then you can perform the same query.

Thanks

Upvotes: 2

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